When showing constant dollar figures on GAAP and non-GAAP financial measures, the foreign exchange impact is calculated by using current foreign exchange rates and applying them to the prior period results. Avient does not provide reconciliations of forward-looking non-GAAP financial measures, such as outlook for Adjusted EBITDA, Adjusted Earnings Per Share and Adjusted Tax Rate, to the most comparable GAAP financial measures on a forward- looking basis because Avient is unable to provide a meaningful or accurate calculation or estimation of reconciling items and the information is not available without unreasonable effort. ASHISH KHANDPUR PRESIDENT & CEO 4 5 PORTFOLIO TRANSFORMATION 5 46% 66% 87% 100% 0% 20% 40% 60% 80% 100% 2005 2010 2015 2020 2023 % o f A dj us te d EB IT D A Commodity JVs Distribution Performance Products & Solutions Specialty Businesses Adjusted EBITDA from Specialty Applications SUSTAINABILITY AS A GROWTH DRIVER 7 LONG-TERM REVENUE GROWTH DRIVERS Sustainable Solutions Composites, Healthcare, Asia / LATAM Overlap Other 60%+ Key Growth Drivers Total Company Revenue Growth Drivers Long-Term Growth Rate Sustainable Solutions 8–12% Composites 8–10% Healthcare 8–10% Asia / LATAM 5% Other 0–2% Avient 6% END MARKET OBSERVATIONS (% OF COMPANY SALES) ENERGY DEFENSE TELECOMMUNICATIONS HEALTHCARE 8 TRANSPORTATION INDUSTRIAL BUILDING & CONSTRUCTION 9% CONSUMER 19% PACKAGING 23% 9 REGIONAL OBSERVATIONS (% OF COMPANY SALES) 9 41% 36% Q 4 2 0 2 3 R E S U LT S Q4 2023 PERFORMANCE VS.

S EC O N D Q UART ER 2022 RE S U LTS $122 $134 $0.87 $0.98 Q2 2022 PERFORMANCE (TOTAL COMPANY) 4 Sales Adjusted Operating Income $1,235 $1,302 + 5% Adjusted EPS + 10% + 13% (in millions) (in millions) (+ 10% excluding FX) (+ 16% excluding FX) (+ 20% excluding FX) Q2 2022 SEGMENT PERFORMANCE 5 CAI $624 $649 ($ in millions) SEM Distribution $86 $94 + 4% + 9% $404 $443 $24 $27 + 10% + 13% (1) $241 $244 $37 $37 + 1% Flat (+ 10% excluding FX) (+ 16% excluding FX) (+ 6% excluding FX) (+ 3% excluding FX) Q2 2021 $1,235 $122 Sustainable Solutions 17 7% 7 Healthcare 23 14% 5 Composites (ex Outdoor High Performance) 10 20% 4 Growth in Asia / LATAM 5 3% 1 Other 69 11% 5 Sub-total $1,359 10% $144 Outdoor High Performance Impact (9) (5) Wage Inflation and Overtime (7) Other Supply Chain Costs (2) Clariant Color Integration Synergies 7 Incentives, Other Employee Costs 4 FX (48) (7) Q2 2022 $1,302 5% $134 Q2 2022 SALES AND OPERATING INCOME (TOTAL COMPANY) 6 Sales Growth Rate Operating Income$ millions EBITDA Q2 EBITDA BRIDGE 7 Price increases more than offsets raw material and supply chain impacts Q2 2021 $ 159 Demand (29) $ millions CAI: Price / Mix 87 Inflation (58) SEM: Price / Mix 36 Inflation (24) Distribution: Price / Mix 45 Inflation (41) Net Price Benefit 45 Wage Inflation and Overtime (7) Other Supply Chain Costs (2) Clariant Color Integration Synergies 7 Incentives, Other Employee Costs 4 FX (7) Q2 2022 $ 170 China Lockdowns / Russia Impact $ (14) Outdoor High Performance (5) Transportation (5) 8 Q2 '21 Adjusted EPS 0.87$ Color, Additives and Inks 0.11 Specialty Engineered Materials 0.01 Distribution 0.03 Corporate Costs 0.01 F/X (0.05) Segment OI 0.11$ Interest Expense 0.03 Tax Rate (0.03) Q2 '22 Adjusted EPS 0.98$ Q2 EPS BRIDGE Key Updates • Provided progress on 2030 Sustainability Goals • Emphasized commitment to U.N. Global Compact & fulfilled Communication of Progress (COP) requirements • New Sustainability Strategy overview page including our 2022 AIP ESG metrics • New ESG Performance page with ESG ratings, awards, and certifications • Increased disclosures on carbon emissions, including disclosure of Climate Change Scenario Analysis • Added new Product Stewardship and Chemical Management policies • Enhanced data reporting for Workforce Demographics • Improved social disclosures on human rights, dependent care and special leave and strategic training management 2021 SUSTAINABILITY REPORT Launching integrated sustainability website in parallel with report Aligned with leading reporting frameworks 9 ESG PERFORMANCE & AWARDS 10 84th ENVIRONMENTAL SOCIAL GOVERNANCE 1 3 (as of 6/30/22) 2022 O U TLO O K $429 $490 $3.05 $3.50 FY 2022 GUIDANCE (TOTAL COMPANY: CURRENT PORTFOLIO) 12 Sales Adjusted Operating Income $4,819 $5,100 + 6% Adjusted EPS + 14% + 15% (in millions) (in millions) (+ 9% excluding FX) (+ 18% excluding FX) (+ 20% excluding FX) 13 CASH FLOW / LEVERAGE ($ millions) 2022E Cash Flow from Operating Activities 400$ Less: Run-Rate CapEx (90) CapEx for Clariant Integration (10) CapEx for IT System Upgrade (15) Total CapEx (115) Free Cash Flow 285$ Adjusted EBITDA 635$ Net Debt / Adjusted EBITDA 1.6x 14 DYNEEMA / DISTRIBUTION UPDATES • Strong performance so far in 2022 in-line with our modeling • Acquisition to be finalized as early as September 1, pending standard regulatory process and closing conditions • Encouraging interest thus far from potential buyers for world-class business with a strong track record • Second round bids due in August DISTRIBUTION 15 PRO FORMA MODELING UPDATE 2022E ($M) Revenue 5,100$ 415$ 5,515$ (1,635)$ 3,880$ Adjusted EBITDA 635 130 765 (109) 656 EBITDA % 12% 31% 14% 7% 17% Adj. D I S T R IBU T I O N) 18 END-MARKET FOCUS FOR NEW INNOVATION Semiconductors Robotics Healthcare Interconnected disruptive markets with massive innovation needs 19 APPENDIX Performance Additives Pigments TiO2 Dyestuffs 3%Polyethylene Nylon 6% Polypropylene Other Raw Materials 30% Styrenic Block Copolymer ~40% hydrocarbon based (Grey shaded materials are hydrocarbon based, includes portion of “Other Raw Materials”) Non-hydrocarbon based materials 22 • Significant raw material price inflation and tight inventory continued in Q2 2022, although at a slightly lesser rate compared to the prior quarter o For Q2 2022, the average cost of key hydrocarbon based materials was up 15%, roughly the same as the average cost of non- hydrocarbon based materials

Factors that could cause actual results to differ materially from those implied by these forward-looking statements include, but are not limited to: • Disruptions, uncertainty or volatility in the credit markets that could adversely impact the availability of credit already arranged and the availability and cost of credit in the future; • The effect on foreign operations of currency fluctuations, tariffs and other political, economic and regulatory risks; • Disruptions or inefficiencies in our supply chain, logistics, or operations; • Changes in laws and regulations in jurisdictions where we conduct business, including with respect to plastics and climate change; • Fluctuations in raw material prices, quality and supply, and in energy prices and supply; • Demand for our products and services; • Production outages or material costs associated with scheduled or unscheduled maintenance programs; • Unanticipated developments that could occur with respect to contingencies such as litigation and environmental matters; • Our ability to pay regular quarterly cash dividends and the amounts and timing of any future dividends; • Information systems failures and cyberattacks; • Amounts for cash and non-cash charges related to restructuring plans that may differ from original estimates, including because of timing changes associated with the underlying actions; • Our ability to achieve strategic objectives and successfully integrate acquisitions, including the implementation of a cloud-based enterprise resource planning system, S/4HANA; • Other factors affecting our business beyond our control, including without limitation, changes in the general economy, changes in interest rates, changes in the rate of inflation, geopolitical conflicts and any recessionary conditions; and • Other factors described in our Annual Report on Form 10-K for the year ended December 31, 2023 under Item 1A, “Risk Factors.” When showing constant dollar figures on GAAP and non-GAAP financial measures, the foreign exchange impact is calculated by using current foreign exchange rates and applying them to the prior period results. For the same reasons, Avient is unable to address the probable significance of the unavailable information. 3 AVIENT OVERVIEW 2023 Financial ResultsCompany Overview Revenue By: 9,300 Employees 102 Manufacturing Sites 20,000+ Customers  Innovating materials and processing solutions to solve our customers’ challenges while enabling a sustainable world  Broad portfolio of technologies with market leading positions and flexibility to anticipate and meet customer needs  Focus is on organic revenue growth and margin expansion, following our successful portfolio transformation $3.14B Revenue $2.36 Adjusted EPS $502M Adjusted EBITDA 16.0% Adjusted EBITDA Margins $186M Adjusted Free Cash Flow U.S. & Canada 64% Specialty Engineered Materials Color Additives and Inks 41% 23% 19% 10% 5% 4% Building & Energy Telecom Geography Segment Industry 2024 Financial Guidance $515 to $540 million Adjusted EBITDA $2.55 to $2.70 Adjusted EPS 4 Industry Sustainability Standards ESG Ratings Performance 1 4 87th 94th percentile Avient CDP Score: A- SUSTAINABILITY PERFORMANCE AND RECOGNITION AU G U S T 6 , 20 24 W EB CAS T P RE SE N TATI O N 6 Q2 2024 HIGHLIGHTS • 5% organic sales growth supported by broad-based growth across all regions in both CAI and SEM segments • Growth stemmed from gaining share, winning new product specifications and restocking in certain end markets • Cost control and operational discipline expanded EBITDA margins by 100 bps • EPS exceeded guidance by $0.05 and increased 21% vs the prior year Adj.

Cable constructions using FireCon CPE formulations are suitable for the following UL Standards: UL 13 - Power-Limited Circuit Cables UL 44 - Thermoset-Insulated Wire and Cable UL 62 - Flexible Cords and Cables UL 1277 - Electrical Power and Control Tray Cables with Optional Optical-Fiber Members UL 2250 - Instrumentation Tray Cable KEY CHARACTERISTICS • Retains flexibility at temperatures below 0°C • Resistant to acids, alkalis, oils, fuels and chemical solvents • Excellent balance of physical properties • Suitable for VW1 and tray cable rated applications • Available in UV resistant grades • Available in custom colors MARKETS AND APPLICATIONS • Oil, gas and petroleum applications • Tray cable • Industrial cable • Low-voltage power cables • Medium-voltage power cables • Control cables • VW1 applications PRODUCT BULLETIN To learn more about FireCon CPE jacketing solutions, contact Avient at 1.844.4AVIENT www.avient.com FIRECON™ CPE 30-33 RoHS CPE 37-36 RoHS CPE 37-31 RoHS CPE 37-31 RoHS Natural Specific Gravity 1.31 1.38 1.39 1.39 MFI (190°C, 21.6 Kg) 15 22.4 34.3 34 Durometer Hardness 39D 31D 34D 34D Tensile Strength, PSI 1,499 2,200 2,096 1,800 Tensile Elongation (%) 350 300 325 300 UL Temperature Rating °C 90 90 90 90 LOI (% Oxygen) 30 37 37 37 Brittleness Temperature °C -33 -36 -31 -31 TECHNICAL PROPERTIES Copyright © 2020, Avient Corporation.

This not only caused a high scrap rate, but also led to frequent interruptions in the automated process so that the mold and machine could be cleaned. In addition to a lower material cost than silicone, the Avient solution offered cycle time efficiencies, lower part weight due to its lower specific gravity, and reduced scrap rates.

In addition to its excellent colorability and high flow, the Versalloy solution possessed a lower specific gravity and resulted in lower scrap rates compared to the competitive TPV, providing the opportunity to reduce system costs. These savings resulted from lower specific gravity of the Avient material (0.88 compared to 0.95) and a 50% reduction in scrap rate.

The manufacturer’s cable lines, in turn, saw a higher scrap rate, which led to delayed deliveries to customers and eventually to the need for price hikes. On its manufacturing lines, the transition to Colorant Chromatics fluoropolymer color concentrates helped slash its scrap rate from 10% to less than 5%.

UL Rating Ammunition Velocity No. Characteristic GlasArmor Thermoset Panels ThermoBallistic Thermoplastic Panels Steel Concrete Performance-to-Weight            Bullet Resistance – Pistols           Bullet Resistance – Rifles    NA1     Temperature Performance        2         UV Resistance       3         Electrical Conductivity              Flame Retardance    5   4         Ease of Installation             1 Ballistic resistance to rifle fire can be achieved by layering ThermoBallistic and GlasArmor panels – contact Avient 2 ThermoBallistic panels made with polypropylene resin systems 3 UV resistance is achieved using surface polymeric films 4 Flame retardant additives can be incorporated upon request under some circumstances 5 Fire rated for 1-hour per ASTM E-119-09c when tested in an interior wall system Compare the different materials used for ballistic protection https://go.avient.com/BallisticProtection?

Factors that could cause actual results to differ materially from those implied by these forward-looking statements include, but are not limited to: disruptions, uncertainty or volatility in the credit markets that could adversely impact the availability of credit already arranged and the availability and cost of credit in the future; the effect on foreign operations of currency fluctuations, tariffs and other political, economic and regulatory risks; the current and potential future impact of the COVID-19 pandemic on our business, results of operations, financial position or cash flows including, without limitation, any supply chain and logistics issues; changes in laws and regulations regarding plastics in jurisdictions where we conduct business; fluctuations in raw material prices, quality and supply, and in energy prices and supply; production outages or material costs associated with scheduled or unscheduled maintenance programs; unanticipated developments that could occur with respect to contingencies such as litigation and environmental matters; our ability to achieve the strategic and other objectives relating to the Avient Protective Materials business; an inability to raise or sustain prices for products or services; our ability to pay regular quarterly cash dividends and the amounts and timing of any future dividends; information systems failures and cyberattacks; amounts for cash and non-cash charges related to restructuring plans that may differ from original estimates, including because of timing changes associated with the underlying actions; and other factors affecting our business beyond our control, including without limitation, changes in the general economy, changes in interest rates, changes in the rate of inflation and any recessionary conditions. Three Months Ended September 30, Nine Months Ended September 30, Reconciliation to Consolidated Statements of Income 2022 2021 2022 2021 Sales $ 823.3 $ 818.0 $ 2,606.5 $ 2,508.5 Gross margin - GAAP 195.4 215.6 710.7 727.3 Special items in gross margin (Attachment 3) 31.8 17.3 35.6 27.7 Adjusted gross margin $ 227.2 $ 232.9 $ 746.3 $ 755.0 Adjusted gross margin as a percent of sales 27.7 % 28.5 % 28.6 % 30.1 % Operating income - GAAP 40.6 52.8 242.9 229.6 Special items in operating income (Attachment 3) 40.2 20.0 48.8 36.6 Adjusted operating income $ 80.8 $ 72.8 $ 291.7 $ 266.2 Adjusted operating income as a percent of sales 9.8 % 8.9 % 11.2 % 10.6 % The table below reconciles pre-special income tax expense and the pre-special effective tax rate to their most comparable US GAAP figures. Three Months Ended September 30, 2022 2021 GAAP Results Special Items Adjusted Results GAAP Results Special Items Adjusted Results (Loss) income from continuing operations before income taxes $ (29.0) $ 82.0 $ 53.0 $ 35.4 $ 19.9 $ 55.3 Income tax expense - GAAP 1.2 — 1.2 (2.0) — (2.0) Income tax impact of special items (Attachment 3) — (20.5) (20.5) — (4.6) (4.6) Tax adjustments (Attachment 3) — 6.8 6.8 — (3.6) (3.6) Income tax (expense) benefit $ 1.2 $ (13.7) $ (12.5) $ (2.0) $ (8.2) $ (10.2) Effective Tax Rate(1) 4.1 % 23.7 % 5.7 % 18.4 % (1) Rates may not recalculate from figures presented herein due to rounding 14 Nine Months Ended September 30, 2022 2021 GAAP Results Special Items Adjusted Results GAAP Results Special Items Adjusted Results Income from continuing operations before income taxes $141.2 $ 89.6 $ 230.8 $176.1 $ 36.5 $ 212.6 Income tax expense - GAAP (41.5) — (41.5) (32.1) — (32.1) Income tax impact of special items (Attachment 3) — (22.5) (22.5) — (8.9) (8.9) Tax adjustments (Attachment 3) — 10.8 10.8 — (1.6) (1.6) Income tax (expense) benefit $ (41.5) $ (11.7) $ (53.2) $ (32.1) $ (10.5) $ (42.6) Effective Tax Rate(1) 29.4 % 23.1 % 18.2 % 20.0 % (1) Rates may not recalculate from figures presented herein due to rounding Three Months Ended September 30, Nine Months Ended September 30, Reconciliation to EBITDA and Adjusted EBITDA: 2022 2021 2022 2021 Net (loss) income from continuing operations – GAAP $ (27.8) $ 33.4 $ 99.7 $ 144.0 Income tax (benefit) expense (1.2) 2.0 41.5 32.1 Interest expense 37.3 19.0 70.4 57.8 Depreciation and amortization from continuing operations 39.8 36.6 113.7 107.1 EBITDA $ 48.1 $ 91.0 $ 325.3 $ 341.0 Special items, before tax 82.0 19.9 89.6 36.5 Interest expense included in special items (10.0) — (10.0) — Depreciation and amortization included in special items (0.8) (0.9) (4.0) (0.1) Adjusted EBITDA $ 119.3 $ 110.0 $ 400.9 $ 377.4 NEWS RELEASE Attachment 1

When showing constant dollar figures on GAAP and non-GAAP financial measures, the foreign exchange impact is calculated by using current foreign exchange rates and applying them to the prior period results. Continue fostering our Great Place to Work® culture Strategic Objectives Long Term Growth Rates Growth Drivers $340 $455 $790 $1,120 $51 $84 $212 $650 $108 $113 $231 $230 $265 $358 $726 $730 8-12% 8-10% 8-10% 5% Sustainable Solutions Composites Healthcare Asia/Emerging Regions Profitable Growth Great Place to Work 5.4% 10.9% 2006 2014 2023E EBITDA Margins $0.14 $1.93 2006 2014 2023E TOP-TIER SUSTAINABILITY PERFORMANCE AND RECOGNITION Industry Sustainability Standards ESG Ratings Performance 1 3 5 87th 94th percentile 5 Innovation is the lifeblood of a specialty company. Avient reflects 2023 adjusted EBITDA guidance of $500M and estimated run-rate CAPEX of $110M. 2023E (%) 27 78 89 83 80 78 74 86 79 76 67 66 55 50 (39) Av ie nt AV PM FM C C Avient Specialty Other Specialty / MULTIPLE EXPANSION Note: Avient reflects 2023 adjusted EBITDA guidance of $500M and closing share price of $41.57.